<html xmlns:mml="http://www.w3.org/1998/Math/MathML">
<head><title>Upload file</title>
<script type="text/javascript" src="openfile.js">
</script></head>
<body>
<br/>
<p>&nbsp;&nbsp;Please select your upload file:</p>
<form name="form1">
&nbsp;&nbsp;<input type="file" name="file1"></input>
<input type="button" name="b1" value="Preview" onClick="preview1()"> </input>
<p>&nbsp;&nbsp;Your uploaded MathML are:</p>
&nbsp;&nbsp;&nbsp; <iframe id='filepre' name='filepre' width='450' height='320'> </iframe>
<br /><center><input type="button" name="b2" value="return" onClick="doReturn()"></input>&nbsp;&nbsp;&nbsp;<input type="button" name="b1" value="cancel" onClick="doCancel()"></input></center>
</form>
</body></html>